FMU Dependencies

Often, Python scripts depends on non-builtin libraries like numpy, scipy, etc. PythonFMU3 does not package a full environment within the FMU. However, you can package a requirements.txt or environment.yml file within your FMU following these steps:

1. Install pythonfmu3 package: pip install pythonfmu3
2. Create a new class extending the Fmi3Slave class declared in the pythonfmu3.fmi3slave module (see below for an example).
3. Create a requirements.txt file (to use pip manager) and/or a environment.yml file (to use conda manager) that defines your dependencies.
4. Run pythonfmu3 build -f myscript.py requirements.txt to create the fmu including the dependencies file.

And using pythonfmu3 deploy, end users will be able to update their local Python environment. The steps to achieve that:

1. Install pythonfmu3 package: pip install pythonfmu3
2. Be sure to be in the Python environment to be updated. Then execute pythonfmu3 deploy -f my.fmu

usage: pythonfmu3 deploy [-h] -f FMU [-e ENVIRONMENT] [{pip,conda}]

Deploy a Python FMU. The command will look in the `resources` folder for one of the following files:
`requirements.txt` or `environment.yml`. If you specify a environment file but no package manager, `conda` will be selected for `.yaml` and `.yml` otherwise `pip` will be used. The tool assume the Python environment in which the FMU should be executed is the current one.

positional arguments:
  {pip,conda}           Python packages manager

optional arguments:
  -h, --help            show this help message and exit
  -f FMU, --file FMU    Path to the Python FMU.
  -e ENVIRONMENT, --env ENVIRONMENT
                        Requirements or environment file.